<template>
  <div class="shopcart">
   <div class="content" @click="toggleList">
     <div class="content-left">
       <div class="logo-wrapper">
         <div class="logo" :class="{'hightlight':totalCount>0}">
           <img src="../../../resource/img/shopcart.png" class="icon-shopping-cart" v-show="totalCount>0">
            <img src="../../../resource/img/shopcart1.png" class="icon-shopping-cart" v-show="totalCount==0">
         </div>
         <div class="number" v-show="totalCount>0">{{totalCount}}</div>
       </div>
       <div class="price" :class="{'pricehightlight':totalPrice>0}">￥{{totalPrice}}</div>
       <div class="desc">另需配送费￥{{deliveryPrice}}元</div>
     </div>
      <div class="content-right" @click.stop.prevent="pay">
        <div class="pay" :class="payClass">
          {{payDesc}}
        </div>
      </div>
   </div>
   <!-- v-show="!listShow" -->
    <transition name="fold">
      <div class="shopcart-list" v-show="listShow">
        <div class="list-header">
          <h1 class="title">购物车</h1>
          <span class="empty" @click="empty">清空</span>
        </div> 
        <div class="list-content" ref="listContent">
          <ul>
            <li class="food" v-for="food in selectFoods">
              <span class="name">{{food.name}}</span>
              <div class="price">
                <span>￥{{food.price*food.count}}</span>
              </div>
              <div class="cartcontrol-wrapper">
                <cartcontrol :food="food"></cartcontrol>
              </div>
            </li>
          </ul>
        </div>
        
      </div>
    </transition>
    <transition name="maskMove">
      <div class="mask" v-show="listShow" @click.stop.prevent="hideList"></div>
    </transition>
  </div>
  
</template>

<script>
import BScroll from "better-scroll";
import cartcontrol from "../../components/cartcontrol/cartcontrol";

export default {
  props: {
    selectFoods: {
      type: Array,
      default() {
        return [];
      }
    },
    deliveryPrice: {
      type: Number,
      default: 0 //默认值
    },
    minPrice: {
      type: Number,
      default: 0 //默认值
    }
  },
  data() {
    return {
      fold: true //购物车开始是折叠状态
    };
  },
  components: {
    cartcontrol
  },
  computed: {
    totalPrice() {
      let total = 0;
      this.selectFoods.forEach(food => {
        total += food.price * food.count;
      });
      return total;
    },
    totalCount() {
      let count = 0;
      this.selectFoods.forEach(food => {
        count += food.count;
      });
      return count;
    },
    payDesc() {
      if (this.totalPrice === 0) {
        return `￥${this.minPrice}元起送`;
      } else if (this.totalPrice < this.minPrice) {
        let diff = this.minPrice - this.totalPrice;
        return `还差￥${diff}元起送`;
      } else {
        return "去结算";
      }
    },
    payClass() {
      if (this.totalPrice < this.minPrice) {
        return "not-enough";
      } else {
        return "enough";
      }
    },
    listShow() {
      if (!this.totalCount) {
        this.fold = true;
        return false;
      }
      let show = !this.fold;
      if (show) {
        this.$nextTick(() => {
          if (!this.scroll) {
            this.scroll = new BScroll(this.$refs.listContent, {
              click: true
            });
          } else {
            this.scroll.refresh();
          }
        });
      }
      return show;
    }
  },
  methods: {
    toggleList() {
      //点击购物车时，购物清单显示，再次点击则隐藏
      if (!this.totalCount) {
        return;
      }
      this.fold = !this.fold;
    },
     hideList() {
      this.fold = true;
    },
    empty() {
      this.selectFoods.forEach(food => {
        food.count = 0;
      });
    },
    pay(){
      if(this.totalPrice<this.minPrice){
        return;
      }
      window.alert(`支付${this.totalPrice}元`)
    }
  }
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
li {
  list-style: none;
}
.shopcart {
  width: 100%;
  height: 48px;
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 50;
  background: black;
}
.content {
  display: flex;
  background: #141d27;
  color: rgba(255, 255, 255, 0.4);
}
.content-left {
  flex: 1;
}
.logo-wrapper {
  display: inline-block;
  position: relative;
  top: -10px;
  margin: 0 12px;
  padding: 6px;
  width: 56px;
  height: 56px;
  box-sizing: border-box;
  vertical-align: top;
  border-radius: 50%;
  background: #141d27;
}
.logo {
  width: 100%;
  height: 100%;
  line-height: 46px;
  border-radius: 50%;
  background: #2b343c;
  text-align: center;
}
.hightlight {
  background: rgb(0, 160, 220);
}
.icon-shopping-cart {
  width: 20px;
  height: 20px;
}
.number {
  position: absolute;
  top: 0;
  right: 0;
  width: 24px;
  height: 16px;
  line-height: 16px;
  text-align: center;
  border-radius: 16px;
  font-size: 9px;
  font-weight: 700;
  color: white;
  background: rgb(240, 20, 20);
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.4);
}
.price {
  display: inline-block;
  font-size: 16px;
  font-weight: 700;
  vertical-align: top;
  line-height: 24px;
  padding-right: 12px;
  margin-top: 12px;
  box-sizing: border-box;
  color: rgba(255, 255, 255, 0.4);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}
.pricehightlight {
  color: #ffffff;
}
.desc {
  display: inline-block;
  vertical-align: top;
  line-height: 24px;
  margin: 12px 0 0 12px;
  font-size: 10px;
  /* color: rgba(255, 255, 255, 0.4); */
}
.content-right {
  flex: 0 0 105px;
  width: 105px;
}
.pay {
  height: 48px;
  line-height: 48px;
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  background: #2b333b;
}
.not-enough {
  background: #2b333b;
}
.enough {
  background: #00b43c;
  color: #ffffff;
}
.shopcart-list {
  position: absolute;
  left: 0;
  top: 0;
  z-index: -1;
  width: 100%;
  transform: translate3d(0, -100%, 0);
}
/* 购物车列表动画效果 */
.fold-enter-active,
.fold-leave-active {
  transition: all 0.5s;
}
.fold-leave-active {
  transform: translate3d(0, -100%, 0);
}
.fold-enter,
.fold-leave-active {
  transform: translate3d(0, 0, 0);
}

.list-header {
  height: 40px;
  line-height: 40px;
  padding: 0 18px;
  background: #f3f5f7;
  border: 1px solid rgba(7, 17, 27, 0.1);
}
.title {
  float: left;
  font-size: 14px;
  color: rgb(7, 17, 27);
}
.empty {
  float: right;
  font-size: 12px;
  color: rgb(0, 160, 220);
}
.list-content {
  padding: 0 18px;
  max-height: 217px;
  background: #fff;
  overflow: hidden;
}
.shopcart-list .food {
  position: relative;
  padding: 12px 0;
  box-sizing: border-box;
  border-bottom: 1px solid rgba(7, 17, 27, 0.1);
}
.shopcart-list .name {
  line-height: 24px;
  font-size: 14px;
  color: rgb(7, 17, 27);
}
.shopcart-list .price {
  position: absolute;
  right: 90px;
  bottom: 12px;
  line-height: 24px;
  font-size: 14px;
  font-weight: 700;
  color: rgb(240, 20, 20);
}
.cartcontrol-wrapper {
  position: absolute;
  right: 0;
  bottom: 6px;
}
.mask {
  width: 100%;
  height: 100%;
  position: fixed;
  left: 0;
  top: 0;
  background: rgba(7, 17, 27, 0.6);
  /* filter: blur(10px); */
  /* backdrop-filter: blur(10px); */
  z-index: -2;
}

.maskMove-enter-active,
.maskMove-leave-active {
  transition: all 0.5s;
}

.maskMove-enter {
  opacity: 1;
}
.maskMove-leave-active {
  opacity: 0;
}
</style>
